Screw-press



J. JACOBS;

SCREW PRESS. v

(No Model.)

Patented Oct. 18,1881.

UNTTE ST TES PATENT Trice.

JAMES JACOBS, OF MAYSVILLE, KENTUCKY.

SCREW-PRESS.

SPECIFICATION forming part of Letters Patent No. 248,322, dated October18, 1881.

Application filed June 13, 1881. (No model.)

To all whom it may concern:

Be it known that I, JAMES JACOBS, a citizen of the United States,residing atMaysville, in the county of Mason and State of Kentucky, haveinvented certain new and useful Improvements in Screw-Presses; and I dohereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to whichit appertains to make and use the same, reference being bad to theaccompanying drawings, and to the letters or figures of reference markedthereon, which form a part of this specification.

My invention relates to screw-presses for packing tobacco and other likematerial; and it consists in the construction, adaptatiomand applicationto a screw-shaft of an adjustable lever-nut, as will be hereinafter morefully set forth.

In the drawings, Figure 1 is a side elevation of my invention, partly invertical section; and Fig. 2 is an enlarged transverse section of samecut through line or 00 of Fig. l.

Passing through a fixed nut, B, which is rigidly attached to a crossbeam or head, 0, (shown in dotted lines, Fig. 1,) is ascrew-shaft, A. Afeather or key groove, (1, is longitudinally cut in the screw-shaftparallel to the axis thereof. A corresponding groove is cut in anadjustable nut, D, and forms, in conjunction with groove a, a seat forkey E. Lever-arms d are also constructed upon theadjustablenut D, andare each provided with a socket, into which is placed a removable lever,F. (Shown in dotted lines, Fig. 1.) The lower end of the screw-shaftrests in a socket constructed in the upper surface of a flangedpresser-block, G. A set-screw, g, passes through the wall of the socket,the inner end of which rests in an annular groove, b, cut in the shaftnear its base. By means of this device the presser-block is relievedfrom the rotary movement of the shaft.

In packing tobacco or other like material in barrels or boxes, and inorder to keep the lever-sockets (heretofore immovably attached to theshaft) from descending below the top edge of the barrel, it has been thecustom to place supplemental blocks under the presscr-block G as thematerial to be pressed sank under the pressure of the screw. When theseblocks were required it was necessary to reverse the power andtemporarily lift the presser-block up out of the way.

In my improved press the use of supplemental blocks is dispensed with,as the presscrblock G continues to descend upon the yielding tobacco.The lever-nut D, carryingleversockets d, is made adj ustablc, and can beraised from time to time to the requisite point by removing the key Efrom its seat, screwing the nut up to the desired height, andreinserting the key in the grooves a and c after the latter have beenbrought opposite each other.

Having thus fully described my invention, what Iclaim as new, and desireto secure by Letters Patent, is

1. In a screw-press, the screw-shaft A, fixed nut B, and adjustablelever-nut D, substantially as described.

2. In combination with screw-shaft A, provided with groove a, thelever-nut D, provided with groove 0, and key E, substantially asdescribed.

8. In combination with screw-shaft A, nut B, and loosely-attachedpresser-hlock G, the adjustable lever-nut D, provided with socketarms d,substantially as described.

In testimony whereof I a-ffix my signature in presence of two witnesses.

JAMES JACOBS.

Witnesses J. B. Novas, W. B. PARRY.

